Accrued Insurance Claims (Details) (USD $)	Oct. 25, 2014	Jul. 26, 2014	Oct. 25, 2014 Maximum	Jul. 25, 2015 Scenario, Forecast
Accrued Insurance Claims [Line Items]
Retained risk of loss, general liability and workers' compensation, maximum automobile liability			$ 1,000,000
Aggregate stop loss coverage for automobile liability, general liability, and workers' compensation claims before adjustment				59,500,000
Insurance liability, annual retained risk loss	250,000
Retained risk of loss per participant for employee health plan for claim amounts that aggregate across all participants in excess of $250,000	550,000
Health plan participant threshold	250,000
Amounts expected to be paid beyond one year:
Accrued Insurance	69,700,000	66,000,000
Accrued insurance claims, Noncurrent	$ 36,189,000	$ 33,782,000